Malicious PDF — malware analysis report

Static analysis result for SHA-256 191a498f9ccf9cc0…

MALICIOUS

PDF

41.1 KB Created: 2020-10-17 08:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: e57b63a2f7ea512b8be9308fa827537e SHA-1: ce10f34d36b67f597bf47cf9b601f421808fe13e SHA-256: 191a498f9ccf9cc066d6d9402588ea0fcdab6fa9b32f1273af4ffca9be0dab5f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/123?keyword=au480+beckman+coulter+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f8916633bcac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8866073b9fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f8944f78447c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8729f251b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f88d73108f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f887fc276274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f89d92f48261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/3105/0651/files/the_pebble_and_the_penguin_drake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/4524145896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/frp_unlock_tool_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a23ac4-8402-4e56-a59d-9c2963de3392/16315027731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd2c38e-4181-4e6b-8546-03c03196c857/kelidanigojitarotil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534aa951-a5be-4464-91ec-7db3db34e6cf/54829261782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ee35b4-d639-4273-8b0a-36eafc54c246/kojikajonepisutetewak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438c4af7-e47a-4bdf-bfec-e964c0b49239/29428287164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c489150-b64e-4048-b743-b12d18606d60/tabamuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafbb7a9-ac48-45d4-9f5e-4284a64f407c/10738561702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332aa760-c7ef-46a6-b323-483514eb2882/73622077049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6572/8920/files/84180724339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7422/3269/files/winstrol_cycle_before_and_after.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8420/9056/files/circles_review_worksheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 5740 bytes
SHA-256: 4cd40f6251a80afed17c2a67277a26db57695cacc093baa7b04412be37a9130c
font_01_sfnt_off00007480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 10216 bytes
SHA-256: ac3b0bc1a3ec2ba61cc660f0cf2438a8fcf4401370b3b036259036a68a179cb7

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